7971420938 has 32 divisors (see below), whose sum is σ = 13741830144. Its totient is φ = 3435409152.

The previous prime is 7971420929. The next prime is 7971420943. The reversal of 7971420938 is 8390241797.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14870 + ... + 127137.

It is an arithmetic number, because the mean of its divisors is an integer number (429432192).

Almost surely, 2^7971420938 is an apocalyptic number.

7971420938 is a deficient number, since it is larger than the sum of its proper divisors (5770409206).

7971420938 is a wasteful number, since it uses less digits than its factorization.

7971420938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142166.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 7971420938 is about 89282.8143485632. The cubic root of 7971420938 is about 1997.6155698762.

The spelling of 7971420938 in words is "seven billion, nine hundred seventy-one million, four hundred twenty thousand, nine hundred thirty-eight".